Praxis classic or clover chainrings

Discuss light weight issues concerning road bikes & parts.
liketoride
Posts: 302
Joined: Wed Nov 21, 2012 3:05 am

by liketoride

i wonder what jason has then

by Weenie


2old4this
Posts: 278
Joined: Mon Jan 13, 2014 7:26 am

by 2old4this

I have the clover compact, and, for the life if me, cannot get a smooth shift from 34t to 50t with di2 9070. I disassembled, assembled, and realigned rings and the derailleur . I even replaced the chain with a new one. Still, it skips shifting once in a while.
BTW, cranks are THM Cla.

Any idea on what might be wrong?

goodboyr
Posts: 1388
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

I've found that the 9070 FD is very sensitive to precise adjustment with praxis rings. Ensure minimum height to teeth, perfectly parallel cage ( run your fingers along it to feel the parallel) and rock solid FD mount including properly placed and tensioned support bolt with aluminum plate. Then it should be perfect shifting as I have.

2old4this
Posts: 278
Joined: Mon Jan 13, 2014 7:26 am

by 2old4this

FD is about a little less than 3mm above the ring. The cage is really really parallel to the ring as well. The chain length is correct (did b-b +2, and calculated as well.) I am thinking about adding 2 more links and trying again.
I have 4 other bikes, one is another 9070, and one 7970. They shift flawlessly. Praxis is the one giving me trouble... :noidea:

goodboyr
Posts: 1388
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

Maybe a bit lower than 3 mm.
And you didn't mention the support bolt.

2old4this
Posts: 278
Joined: Mon Jan 13, 2014 7:26 am

by 2old4this

You are right, I didn't specifically mentioned about the support bolt. Yes, I used it to make the cage parallel to the chain-ring. I will lower the FD to 1mm and see if it helps.

danbjpa
Posts: 313
Joined: Sun Aug 08, 2010 5:12 am
Location: Brasil

by danbjpa

Old topic but ok..
I went to buy set of Praxis but I pause checkout button to certify some infos and now I'm confused about weight....

FairWheell (as said here) list
Clover 53/39 = 120,7g
Classic 53/39 = 126,7g

R2bike list (with pics) as:
Clover (black2tone) 53/39= 154,7g source
Classic 53/39 = 144,9g source

Are really Clover Black2tone 34g more heavy than Clover or all models increase weight over the time?
The weight sequence are (nowadays): Clover < Classic < Clover black2tone ?

(sorry my english)

wheelzqc
Posts: 247
Joined: Thu Jun 09, 2011 6:51 pm

by wheelzqc

I weighted mine and from memory they were closer to 150 then 120.

danbjpa
Posts: 313
Joined: Sun Aug 08, 2010 5:12 am
Location: Brasil

by danbjpa

Thanks.
I bought a set of Clover (hard black). Hope they are closer 120g. Fairwheel and lots of users here can't be wrong in choose them over Classic model to save weight.
I'll try post a pic on the scale when arrive.


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danbjpa
Posts: 313
Joined: Sun Aug 08, 2010 5:12 am
Location: Brasil

by danbjpa

Received. Sorry the delay but just to register the weight... 39t = 32,44g / 53t = 118,99.
Image


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